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James Charles Napoleon Humphreys, Mining papers Item Com objeto digital
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Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground plan, Battery Section (Rietvlei no. 113)
Underground plan, Battery Section (Rietvlei no. 113)
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
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